I am not sure of which West Coast cruises you are talking about when you mention some being offered in spring 2016. But the Wonder will most likely make her way to the West Coast via the Panama Canal in 2017. So far her schedule is out until April 2017. In previous years, the Panama Canal transit was during the first two weeks of May. So there might be some cruises on the West Coast in May 2017. It is very likely that there will be at least one transitioning cruise from San Diego (or LA) to Vancouver for the start of the Alaska season.